LP28 is a very powerful software installed , microcontroller based device like on the other LP series devices.LP28 is very cost effective where a double loop is needed. It is very handy ,compact and easy to install so easily adapted to your applications.

Applications

Road Blocker (automatic open/close)

Barriers (automatic open/close)

Single entry auto parks

Vehicle counting

Specifications

Adjustable relay hold time: You can set relay hold time after detection to 4 different values using 2 bit switches.

Adjustable Sensitivity: You can set the sensitivity to 4 different values using 2 bit switches. This feature allows you to detect/undetect less dense materials such as bicycle, motorbike etc

Isolation: The connection between the loop and the controller is isolated with a transformer. This isolation makes the system work more stable , safe and without any external interaction.

Displays: LP48 has 2 led indicators showing.
a-) Fault: If loop is broken or deformed, is lit
b-) Activation: If a vehicle is detected is lit and stays lit until it goes away.

Function Keys: 2 bits. That is 4 different combinations for working mode and tuning parameters are possible.

4 different modes.a-) 1on-2on Continuous hold: Output is activated when vehicle is detected and stays active until the vehicle leaves.b-) 1on-2off Trigger on enter: Output is activated for 1 second when vehicle is detected. Another activation is possible only after vehicle leaves the loop.c-) 1off-2on Trigger on Leaving: Output is activated for 1 second when vehicle leaves the loop.d-) 1off-2off 4 minute hold: Output is activated when vehicle is detected. Output stays active as long as vehicle is on the loop for a maximum time of 4 minutes. After 4 minutes the output is deactivated and the system is resetted. (If the vehicle moves but staying still on the loop, the output is activated for another 4 min.

Function Keys

:

You can select different working modes for loop antenna inputs and independant relay outputs.a-) 7on-8on AB or BA direction vehicle counting: This mode is useful for counting in and outgoing vehicles in auto parks with unique door, determining nbr of vehicles inside. If vehicle detected on AB direction Relay1 is activated for 1 Second. If vehicle detected on BA direction Relay2 is activated for 1 Second. These pulses are connected to count inputs of a digital display to show vacant capacity in the auto park.b-) 7on-8off: Reserved for future use.c-) 7off-8on: Reserved for future use.d-) 7off-8off: Standard working mode.

Response time

:

To activate : 25 ms +/- 5 msTo deactivate : 30ms +/- 5 ms

Protection

:

Transformer, diode and high voltage lamps are used inside to protect the device from high voltages and noise coming from the loop antenna